Construct: w expression is governed by a fragment of en promoter extending from -0.4kb to +188bp upstream of the transcription start site. A 1100bp fragment from the mouse Hox1.2-Hox1.3 intragenic region is fused to the 5' end of en and acts as a spacer between en sequences and w+mC.
construct_comment: Expression observed in homozygotes versus heterozygotes; tested for proximity dependence (transvection).
construct_comment: One of a series of constructs analyzed for effects of en sequences upon expression of the adjacent w+mC gene.
construct_comment: One of several constructs designated P{en3}.